third-party/leptonica/prog/histotest.c
/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*====================================================================*/
/*
* histotest.c
*
* Makes histograms of grayscale and color pixels
* from a pix. For RGB color, this uses
* rgb --> octcube indexing.
*
* histotest filein sigbits
*
* where the number of octcubes is 8^(sigbits)
*
* For gray, sigbits is ignored.
*/
#include "allheaders.h"
int main(int argc,
char **argv)
{
char *filein;
l_int32 d, sigbits;
GPLOT *gplot;
NUMA *na;
PIX *pixs;
static char mainName[] = "histotest";
if (argc != 3)
return ERROR_INT(" Syntax: histotest filein sigbits", mainName, 1);
filein = argv[1];
sigbits = atoi(argv[2]);
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
d = pixGetDepth(pixs);
if (d != 8 && d != 32)
return ERROR_INT("depth not 8 or 32 bpp", mainName, 1);
if (d == 32) {
startTimer();
if ((na = pixOctcubeHistogram(pixs, sigbits, NULL)) == NULL)
return ERROR_INT("na not made", mainName, 1);
fprintf(stderr, "histo time = %7.3f sec\n", stopTimer());
gplot = gplotCreate("/tmp/junkrootc", GPLOT_X11,
"color histogram with octcube indexing",
"octcube index", "number of pixels in cube");
gplotAddPlot(gplot, NULL, na, GPLOT_LINES, "input pix");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
else {
if ((na = pixGetGrayHistogram(pixs, 1)) == NULL)
return ERROR_INT("na not made", mainName, 1);
numaWrite("/tmp/junkna", na);
gplot = gplotCreate("/tmp/junkrootg", GPLOT_X11, "grayscale histogram",
"gray value", "number of pixels");
gplotSetScaling(gplot, GPLOT_LOG_SCALE_Y);
gplotAddPlot(gplot, NULL, na, GPLOT_LINES, "input pix");
gplotMakeOutput(gplot);
gplotDestroy(&gplot);
}
pixDestroy(&pixs);
numaDestroy(&na);
return 0;
}